Section R. 325.10704i - Total coliform; treatment technique triggers; assessmentsRule 704i.
(1) Supplies shall conduct assessments under subrule (2) of this rule after exceeding treatment technique triggers in this subrule. (a) Level 1 treatment technique triggers are all of the following: (i) For supplies taking 40 or more samples per month, the supply exceeds 5.0% total coliform-positive samples for the month.(ii) For supplies taking fewer than 40 samples per month, the supply has 2 or more total coliform-positive samples in the same month.(iii) The supply fails to take every required repeat sample after a single total coliform-positive sample.(b) Level 2 treatment technique triggers are all of the following: (i) An E. coli MCL violation in R 325.10704j(1).(ii) A second level 1 trigger as defined in subdivision (a) of this subrule, within a rolling 12-month period, unless the department has determined a likely reason that the samples that caused the first level 1 treatment technique trigger were total coliform-positive and has established that the supply has corrected the problem.(iii) For supplies with approved annual monitoring, a level 1 trigger in 2 consecutive years.(2) Assessment requirements are all of the following: (a) Supplies shall ensure that level 1 and 2 assessments are conducted to identify the possible presence of sanitary defects and defects in distribution system coliform monitoring practices. Level 2 assessments shall be conducted by the department.(b) When conducting assessments, supplies shall ensure that the assessor evaluates all of the following minimum elements: (i) Review and identification of inadequacies in sample sites.(iv) Atypical events that could affect distributed water quality or indicate that distributed water quality was impaired.(v) Changes in distribution system maintenance and operation that could affect distributed water quality, including water storage.(vi) Source and treatment considerations that bear on distributed water quality, where appropriate, for example, small ground water supplies.(vii) Existing water quality monitoring data. Note to subdivision (b) of this subrule: The supply shall conduct the assessment consistent with department directives that tailor specific assessment elements with respect to the size and type of the supply and the size, type, and characteristics of the distribution system.
(c) A supply shall conduct a level 1 assessment consistent with department requirements if the supply exceeds 1 of the level 1 treatment technique triggers in subrule (1)(a) of this rule. All of the following apply to level 1 assessments: (i) The supply shall complete a level 1 assessment as soon as practical after a trigger in subrule (1)(a) of this rule. In the completed assessment form, the supply shall describe sanitary defects detected, corrective actions completed, and a proposed timetable for each corrective action not already completed. The assessment form may also note that no sanitary defects were identified. The supply shall submit the completed level 1 assessment form to the department within 30 days after the supply learns that it has exceeded a trigger.(ii) If the department reviews the completed level 1 assessment and determines that the assessment is not sufficient, including the proposed timetable for each corrective action not already completed, the department shall consult with the supply. If the department requires revisions after consultation, the supply shall submit a revised assessment form to the department on an agreed-upon schedule not to exceed 30 days from the date of the consultation.(iii) Upon completion and submission of the assessment form by the supply, the department shall determine if the supply has identified a likely cause for the level 1 trigger and, if so, establish that the supply has corrected the problem, or has included a schedule acceptable to the department for correcting the problem.(d) A supply shall undergo a level 2 assessment if the supply exceeds 1 of the treatment technique triggers in subrule (1)(b) of this rule. The supply shall comply with any expedited actions or additional actions required by the department in the case of an E. coli MCL violation. The supply shall undergo a level 2 assessment by the department as soon as practical after a trigger in subrule (1)(b) of this rule. The assessment form shall describe sanitary defects detected, corrective actions completed, and a timetable for each corrective action not already completed. The assessment form may also note that no sanitary defects were identified. The department shall determine whether the likely cause for the Level 2 trigger has been identified and whether the supply has corrected the problem.(3) Supplies shall correct sanitary defects found through either level 1 or 2 assessments conducted under subrule (2) of this rule. For corrections not completed by the time of submission of the assessment form, the supply shall complete the corrective action or actions in compliance with a timetable approved by the department in consultation with the supply. The supply shall notify the department when each scheduled corrective action is completed.(4) At any time during the assessment or corrective action phase, either the water supply or the department may request a consultation with the other person to determine the appropriate actions to be taken. The supply may consult with the department on all relevant information that may impact on its ability to comply with a requirement of these total coliform rules R 325.10704a to R 325.10704k, including the method of accomplishment, an appropriate time frame, and other relevant information.Mich. Admin. Code R. 325.10704i
2015 MR 20, Eff. 10/16/2015